It’s about communication. Occasionally one needs to communicate complex structures to an audience with unclear capabilities. The ability to fall back to somethi

It’s about communication. Occasionally one needs to communicate complex structures to an audience with unclear capabilities. The ability to fall back to something that one can reasonably hope is understood more or less the same way by both the writer and the reader is invaluable. If you are not dealing with complex structures or have other ways for communicating them or share another language with the reader (what do these boxes _mean_?), UML is not useful.